Multi-Family Office vs Fee-Only RIA: A $30M–$150M Decision Guide

For founders post-exit, inheritors, and senior executives evaluating their wealth management structure. Not investment advice — your specific situation requires qualified counsel.

If you've recently crossed $30M in investable assets — from a liquidity event, inheritance, or accumulated compensation — you're squarely in the range where the MFO vs. fee-only RIA question becomes real. Get it wrong and you're paying $150K–$300K per year more than necessary, or you're underserved when coordination across estate, tax, investment, and insurance is what you actually need.

This guide covers the real service differences, a cost comparison at your asset level, and a decision framework based on what actually matters at this range.

What each structure actually provides

Service area	Fee-only RIA (UHNW-focused)	Multi-family office
Investment management	Direct indexing, SMAs, alternatives access via network	Investment committee, proprietary + open-architecture access
Tax planning	Coordinates with your CPA; some firms have embedded CPAs	In-house tax team or embedded CPA at most MFOs
Estate planning	Coordinates with your estate attorney	In-house estate attorneys at larger MFOs; all coordinate
Philanthropic planning	DAF, CRT, private foundation strategy and coordination	Dedicated philanthropic services team
Bill pay / bookkeeping	Rarely included; refer out	Typically included above $50M AUM
Family governance	Refer to family office consultant	Family council facilitation, family constitution drafting
Consolidated reporting	Performance reports, often excluding held-away assets	Full consolidated balance sheet: investments, real estate, business interests, collections
Alternative investments	Hedge funds, PE/VC access via advisor network	Proprietary deal flow, co-investment, lower minimums via aggregation
Insurance / risk management	Fee-only insurance specialist referral	In-house risk management team
Lifestyle / concierge services	Not included	Included at premium tiers ($100M+)

Cost comparison calculator

Enter your investable assets to compare estimated annual advisory costs. Adjust the rates to match actual proposals you receive.

Decision framework: when each makes sense

Choose a fee-only RIA when:

Your assets are $30M–$75M and you want advisory cost below $200K/year. A UHNW-specialized fee-only RIA typically delivers 80–90% of MFO service scope at 40–60% lower cost in this range.
Your existing professional advisors (CPA, estate attorney) are already strong. A fee-only RIA coordinates with them — you don't need to pay for in-house equivalents you'd share with 100 other client families.
You had a recent liquidity event and are building your advisory team from scratch. A fee-only RIA can serve as the coordinator while you assemble specialists, without locking you into a bundled structure prematurely.
Investment independence matters to you. Fee-only RIAs have no proprietary fund shelf and no product incentives. The fiduciary obligation is cleaner when the advisor makes no money from product sales or affiliated funds.
Your family structure is simple — one household, not a multi-branch family with different members needing different service levels and governance oversight.

Choose a multi-family office when:

Your assets are $75M+ and the MFO flat fee as a percentage of assets is approaching or below what a fee-only RIA charges on AUM. Above roughly $80M–$100M, MFO flat fees often become cost-competitive.
You need consolidated operations — bill pay, bookkeeping across multiple entities, tax document aggregation for properties, business interests, and investment accounts, all in one place.
Your family structure is complex — multiple generations, siblings with different objectives, or family members spread across geographies who need coordinated governance and potentially different service levels.
Family governance is a real near-term need — family constitution, investment policy statement, family council, heir education programs. MFOs have dedicated practice areas for this; fee-only RIAs generally don't.
Your life has significant operational complexity — multiple properties, aircraft, collections, domestic staff, international assets, or ongoing business operations that need financial coordination well beyond investment management.

The coordinator model: what most $30M–$100M families actually need

Many families in the $30M–$100M range don't need an MFO. They need a fee-only RIA who functions as a wealth quarterback — someone who coordinates between a UHNW-focused CPA, an estate attorney who specializes in sophisticated trust structures, and a risk management specialist, with the advisor as hub.

This coordinator model replicates 85–90% of MFO value at meaningfully lower cost because you're not paying for in-house staff you'd share with dozens of other families. The inefficiency that this model eliminates is advisor silos — the CPA who doesn't know what the estate attorney is doing, the investment manager who doesn't know the charitable giving plan. A strong fee-only RIA coordinator eliminates that fragmentation without the overhead of a fully staffed family office.

The coordinator model works best when your advisor either knows specialist referrals well or helps you assemble a team. Ask any prospective fee-only RIA: "Who are the estate attorneys and CPAs your clients typically work with, and do they routinely communicate with you?" The answer tells you whether they're actually a coordinator or just an investment manager with a broader pitch.

Red flags when evaluating both types

Unclear fee disclosure. Any MFO or RIA who can't provide a written, complete fee schedule — including any fund expense ratios, custodian payments, and third-party referral fees — before you engage is not acting in your interest.
Proprietary products. If the MFO manages its own hedge fund and recommends it to clients, the recommendation is structurally conflicted. Ask specifically whether the firm has affiliated investment products and how the recommendation process handles that conflict.
Rotating relationship teams. At large wirehouses and some MFOs, your "relationship manager" may change every 18–24 months. Know who specifically will manage your account and ask about tenure — both at the firm and on the UHNW team.
No UHNW minimum. A firm that claims to serve $1M and $100M clients with equal expertise is almost certainly mediocre at UHNW work. Planning complexity at $50M — estate exemption optimization, SLATs, DAF timing, direct indexing at scale, multi-entity reporting — is categorically different from planning at $2M.
Vague on specialist coordination. A fee-only RIA who says they "work with your other advisors" but can't describe exactly how and how often they communicate with your CPA and estate attorney is describing aspiration, not a system.

Questions to ask before hiring either

Who specifically manages my day-to-day relationship — and what is their tenure at this firm?
What is the complete written fee schedule? Any fees from custodians, fund companies, or third-party referrals?
How many current clients have $30M+ in investable assets?
How do you coordinate across tax, estate, and investment decisions — who makes the first call when something changes?
What does your consolidated reporting look like — can I see a sample? Does it include held-away assets and non-investment accounts?
Can you provide three references — with consent — from clients in a comparable situation?

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Content is for informational purposes only and does not constitute financial, tax, or investment advice.

Frequently asked questions

What is the minimum investable asset level for a multi-family office?

Most multi-family offices require $30M–$50M in investable assets to open a relationship, with a practical sweet spot of $50M–$200M. Some premium MFOs set the minimum at $100M+. Below $50M, a fee-only RIA specializing in UHNW clients typically delivers comparable depth of planning at 40–60% lower annual cost.

At what asset level does an MFO become cost-competitive with a fee-only RIA?

The exact crossover depends on the fee quotes you receive. At typical rates — fee-only RIA at 0.35% AUM versus MFO flat fee of $250,000 — the MFO becomes cheaper above approximately $71M in investable assets. Use the cost comparison calculator above to find the break-even for your specific situation.

What does a multi-family office provide that a fee-only RIA does not?

Multi-family offices typically include consolidated balance sheet reporting (covering real estate, business interests, and non-investment accounts), bill pay and bookkeeping, in-house tax and estate staff, dedicated family governance programs, and lifestyle or concierge services at premium levels ($100M+). Fee-only RIAs coordinate these services through specialist referrals rather than providing them in-house — usually less expensive for $30M–$75M families.

Is a fee-only RIA a fiduciary for UHNW clients?

Yes. All registered investment advisers are legally required to act as fiduciaries under the Investment Advisers Act of 1940. Multi-family offices registered as investment advisers are subject to the same standard. The key distinction is compensation: fee-only RIAs earn no commissions or product-based revenue, which eliminates a common source of conflicts even within a fiduciary framework.

Can a fee-only RIA provide access to alternative investments at the UHNW level?

Yes. UHNW-focused fee-only RIAs typically maintain networks giving clients access to hedge funds, private equity, private credit, and real assets. The difference from an MFO is access through an advisor network rather than proprietary deal flow. For most $30M–$100M clients the selection quality is comparable; the biggest difference is at $100M+ where some MFOs offer truly proprietary co-investment opportunities.

How should I choose between an MFO and a fee-only RIA after a liquidity event?

Start with asset level and complexity. At $30M–$75M, a fee-only RIA specializing in UHNW work delivers 85–90% of MFO service scope at 40–60% lower annual cost for most founders and executives. At $100M+ with genuine need for consolidated operations (bill pay, multi-entity reporting, family governance programs), get written proposals from both types and compare total cost and service scope directly. Ask for written fee disclosures and three client references before signing anything.

Sources

Fee ranges cited are industry-typical estimates as of 2026; actual fees vary significantly by firm, client complexity, and negotiation. Verify fee schedules directly with any firm you engage.